TEST datasheet(49/49 Pages) ETC

49 / 49 page

NXP Semiconductors

PCAL6408A

Low-voltage translating, 8-bit I2C-bus/SMBus I/O expander

For more information, please visit: http://www.nxp.com

For sales office addresses, please send an email to: salesaddresses@nxp.com

Date of release: 18 September 2013

Document identifier: PCAL6408A

Please be aware that important notices concerning this document and the product(s)

described herein, have been included in section ‘Legal information’.

23. Contents

General description . . . . . . . . . . . . . . . . . . . . . . 1

Features and benefits . . . . . . . . . . . . . . . . . . . . 2

2.1

Agile I/O features . . . . . . . . . . . . . . . . . . . . . . . 3

Ordering information . . . . . . . . . . . . . . . . . . . . . 3

3.1

Ordering options . . . . . . . . . . . . . . . . . . . . . . . . 4

Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Pinning information . . . . . . . . . . . . . . . . . . . . . . 5

5.1

Pinning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

5.2

Pin description . . . . . . . . . . . . . . . . . . . . . . . . . 6

Voltage translation . . . . . . . . . . . . . . . . . . . . . . . 7

Functional description . . . . . . . . . . . . . . . . . . . 7

7.1

Device address . . . . . . . . . . . . . . . . . . . . . . . . . 7

7.2

Interface definition . . . . . . . . . . . . . . . . . . . . . . 8

7.3

Pointer register and command byte . . . . . . . . . 8

7.4

7.4.1

Input port register (00h) . . . . . . . . . . . . . . . . . . 9

7.4.2

Output port register (01h) . . . . . . . . . . . . . . . . . 9

7.4.3

Polarity inversion register (02h) . . . . . . . . . . . . 9

7.4.4

Configuration register (03h) . . . . . . . . . . . . . . . 9

7.4.5

Output drive strength registers (40h, 41h) . . . 10

7.4.6

Input latch register (42h). . . . . . . . . . . . . . . . . 10

7.4.7

Pull-up/pull-down enable register (43h) . . . . . 11

7.4.8

Pull-up/pull-down selection register (44h). . . . 11

7.4.9

Interrupt mask register (45h) . . . . . . . . . . . . . 11

7.4.10

Interrupt status register (46h) . . . . . . . . . . . . . 12

7.4.11

Output port configuration register (4Fh) . . . . . 12

7.5

I/O port . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

7.6

Power-on reset . . . . . . . . . . . . . . . . . . . . . . . . 14

7.7

Reset input (RESET) . . . . . . . . . . . . . . . . . . . 14

7.8

Interrupt output (INT) . . . . . . . . . . . . . . . . . . . 14

Bus transactions . . . . . . . . . . . . . . . . . . . . . . . 15

8.1

Write commands. . . . . . . . . . . . . . . . . . . . . . . 15

8.2

Read commands . . . . . . . . . . . . . . . . . . . . . . 16

Application design-in information . . . . . . . . . 18

9.1

Minimizing IDD when I/Os control LEDs . . . . . 18

9.2

Output drive strength control . . . . . . . . . . . . . 19

9.3

Power-on reset requirements . . . . . . . . . . . . . 20

9.4

Device current consumption with internal

pull-up and pull-down resistors . . . . . . . . . . . . 22

Limiting values. . . . . . . . . . . . . . . . . . . . . . . . . 23

Recommended operating conditions. . . . . . . 23

Thermal characteristics . . . . . . . . . . . . . . . . . 24

Static characteristics . . . . . . . . . . . . . . . . . . . . 24

13.1

Typical characteristics . . . . . . . . . . . . . . . . . . 27

Dynamic characteristics . . . . . . . . . . . . . . . . . 31

Parameter measurement information . . . . . . 32

Package outline. . . . . . . . . . . . . . . . . . . . . . . . 36

Soldering of SMD packages . . . . . . . . . . . . . . 40

17.1

Introduction to soldering. . . . . . . . . . . . . . . . . 40

17.2

Wave and reflow soldering. . . . . . . . . . . . . . . 40

17.3

Wave soldering . . . . . . . . . . . . . . . . . . . . . . . 40

17.4

Reflow soldering . . . . . . . . . . . . . . . . . . . . . . 41

Soldering: PCB footprints . . . . . . . . . . . . . . . 43

Abbreviations . . . . . . . . . . . . . . . . . . . . . . . . . 46

Revision history . . . . . . . . . . . . . . . . . . . . . . . 46

Legal information . . . . . . . . . . . . . . . . . . . . . . 47

21.1

Data sheet status . . . . . . . . . . . . . . . . . . . . . . 47

21.2

Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . 47

21.3

Disclaimers . . . . . . . . . . . . . . . . . . . . . . . . . . 47

21.4

Trademarks . . . . . . . . . . . . . . . . . . . . . . . . . . 48

Contact information . . . . . . . . . . . . . . . . . . . . 48

Contents. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49

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